http://www.orchidmall.com/soci...
http://www.orchidmall.com/plan...
The Orchid Mall lists the Orchid Societies and Vendors, but you would have to go through the lists and see who is near you.
If one subscribes to Orchid Digest, the magazine of the AOS, there is always a list of what is happening regarding Orchid shows, which would be my favorite way of buying Orchids, at shows. And many Vendors have their annual Open House, around here usually in Winter.
Here is the link to the AOS, note the link to the Orchid source directory on the upper right.
http://aos.org/default.aspx?id...
that link might be easier to use than the Orchid Mall?